Rogues (always), warriors (spec-dependent), shamans (spec-dependent), hunters (I think)...
edit: just so I'm clear, I don't mean that Rogues are born with the ability and that warriors much spec into it. Rather that you'll never see a rogue with a big 2-hander and that, in order for DW to make sense, a warrior would spec into it.
Edited, Feb 14th 2008 4:03pm by AynLoD